#include <iostream>
#include <vector>
using namespace std;

const int N = 1e5 + 10;

vector<int> a[N];

int n,q;

int main(){
    cin >> n >> q;
    while(q--){
        int op,i,j,k;
        cin >> op >> i >> j;
        if(op == 1){
            cin >> k;
            if(a[i].size() <= j)
            {
                a[i].resize(j + 1);
            }
            a[i][j] = k;
        }else{
            cout << a[i][j] << endl;
        }
    }
    return 0;   
}
